Abstract: The invention relates to methods for producing non-aggregated, modified silicon particles by treating non-aggregated silicon particles which have volume-weighted particle size distributions with diameter percentiles d50 of 1.0 ?m to 10.0 ?m at 80° C. to 900° C. with an oxygen-containing gas.

Abstract: The invention relates to polymer-grafted silicon particles, wherein the silicon particles have an average particle size (d50) of 700 nm to 10 ?m and the polymers of the polymer-grafted silicon particles are attached to the silicon particles in a wash-stable manner in an aqueous medium.

Abstract: The invention relates to non-aggregated carbon-coated silicon particles having average particle diameters d50 of 1 to 15 ?m, which particles contain ?10 wt % carbon and ?90 wt % silicon, each based on the total weight of the carbon-coated silicon particles

Abstract: 4-(dialkylchlorosilyl)butyronitriles are prepared by high yield by reacting a mixture of technical grade allyl cyanide with dialkylchlorosilanes in the presence of a catalyst of transition group 8 of the Periodic Table of the Elements, wherein the reaction is conducted such that a stoichiometric excess of the dialkylchlorosilane is present together with the catalyst in the reaction mixture, into which the allyl cyanide is metered.

Abstract: 4-(dialkylchlorosilyl)butyronitriles are prepared by high yield by reacting a mixture of technical grade allyl cyanide with dialkylchlorosilanes in the presence of a catalyst of transition group 8 of the Periodic Table of the Elements, wherein the reaction is conducted such that a stoichiometric excess of the dialkylchlorosilane is present together with the catalyst in the reaction mixture, into which the allyl cyanide is metered.

Abstract: The invention relates to methods for producing non-aggregated, modified silicon particles by treating non-aggregated silicon particles which have volume-weighted particle size distributions with diameter percentiles d50 of 1.0 ?m to 10.0 ?m at 80° C. to 900° C. with an oxygen-containing gas.

Abstract: The invention relates to core-shell composite particles, the core being a porous, carbon-based matrix containing silicon particles and the shell being non-porous and being obtainable by the carbonization of one or more carbon precursors, the silicon particles having average particle sizes of 1 to 15 ?m.

Abstract: The invention relates to polymer-grafted silicon particles, wherein the silicon particles have an average particle size (d50) of 700 nm to 10 ?m and the polymers of the polymer-grafted silicon particles are attached to the silicon particles in a wash-stable manner in an aqueous medium.

Abstract: The invention relates to spherical, nonporous Silicon particles having average particle sizes (d50) of 1 to 10 pm and a silicon content of 97 to 99.8 wt. %, the silicon content relating to the total weight of the silicon particles minus any oxygen content.

Abstract: The invention relates to core-shell composite particles, wherein the shell is based on carbon and is nonporous and the core is a porous aggregate containing a plurality of silicon particles, carbon and optionally further components, where the silicon particles have average particle sizes (d50) of from 0.5 to 5 ?m and are present in the core in a proportion of ?80% by weight, based on the total weight of the core-shell composite particles.

Abstract: The invention relates to non-aggregated carbon-coated silicon particles having average particle diameters d50 of 1 to 15 ?m, which particles contain ?10 wt % carbon and ?90 wt % silicon, each based on the total weight of the carbon-coated silicon particles

Abstract: Silicon is produced by magnesiothermic reduction of silicon dioxide, wherein to achieve magnesiothermic reduction a reactant mixture is employed which contains silicon dioxide (SiO2) and magnesium (Mg) and, as moderators, magnesium oxide (MgO) and silicon (Si), and optionally further moderators.

Abstract: A process for selective transvinylation of a reactant carboxylic acid with a reactant vinyl ester to give a product vinyl ester and the corresponding acid of the reactant vinyl ester in the presence of one or more ruthenium catalysts, wherein a) the reactant vinyl ester, the reactant carboxylic acid and the ruthenium catalyst are supplied to a reactor, wherein b) the molar ratio of reactant vinyl ester to reactant carboxylic acid is 1:3 to 3:1, and c) the transvinylation reaction is conducted, d) on completion of the transvinylation reaction, the reactant vinyl ester and the corresponding acid are separated from the reaction mixture by distillation, e) the product vinyl ester is separated by distillation from the bottom product of the distillation, and f) the remaining reaction mixture is recycled into the reactor.

Abstract: The invention provides mixtures, liquid at 25° C.

Abstract: A process for selective transvinylation of a reactant carboxylic acid with a reactant vinyl ester to give a product vinyl ester and the corresponding acid of the reactant vinyl ester in the presence of one or more ruthenium catalysts, wherein a) the reactant vinyl ester, the reactant carboxylic acid and the ruthenium catalyst are supplied to a reactor, and b) the transvinylation reaction is conducted, wherein c) the transvinylation reaction is conducted at a conversion of more than 50%, d) on completion of the transvinylation reaction, the reactant vinyl ester and the corresponding acid are separated from the reaction mixture by distillation, e) the product vinyl ester is separated by distillation from the bottom product of the distillation, and f) the remaining reaction mixture is recycled into the reactor.

Abstract: Silicon is produced by magnesiothermic reduction of silicon dioxide, wherein to achieve magnesiothermic reduction a reactant mixture is employed which contains silicon dioxide (SiO2) and magnesium (Mg) and, as moderators, magnesium oxide (MgO) and silicon (Si), and optionally further moderators.

Abstract: The invention relates to a method for separating a mixture containing at least one carboxylic acid vinyl ester of general formula R?—C(O)O—CH?CH2 and at least one carboxylic acid of general formula R?—COOH, wherein R? in either case can be an aliphatic group having 12 to 22 C atoms or a cycloaliphatic group having 12 to 22 C atoms, or an aromatic group having 12 to 22 C atoms, and R? can be identical or different, characterized in that the carboxylic acid is converted to its anhydride R?—C(O)—O—C(O)—R? and the carboxylic acid vinyl ester is subsequently separated.

Abstract: The invention relates to a process for transvinylation of a carboxylic acid feedstock with a vinyl ester feedstock to obtain a vinyl ester product and the corresponding acid of the vinyl ester feedstock in the presence of one or more ruthenium catalysts, wherein a) the vinyl ester feedstock, the carboxylic acid feedstock and a ruthenium catalyst are fed to the reactor, and b) the transvinylation reaction is carried out, characterized in that a carbonyl-free Ru(III) carboxylate is used as the ruthenium catalyst and in that no carbon monoxide is supplied, c) the reaction is carried out at a temperature of 110 to 170° C., d) upon completion of the transvinylation reaction, the vinyl ester feedstock and the corresponding acid are separated from the reaction mixture by distillation, e) the vinyl ester product is separated by distillation from the bottom product of the distillation, and f) the remaining reaction mixture is recycled into the reactor.

Abstract: A process for selective transvinylation of a reactant carboxylic acid with a reactant vinyl ester to give a product vinyl ester and the corresponding acid of the reactant vinyl ester in the presence of one or more ruthenium catalysts, wherein a) the reactant vinyl ester, the reactant carboxylic acid and the ruthenium catalyst are supplied to a reactor, wherein b) the molar ratio of reactant vinyl ester to reactant carboxylic acid is 1:3 to 3:1, and c) the transvinylation reaction is conducted, d) on completion of the transvinylation reaction, the reactant vinyl ester and the corresponding acid are separated from the reaction mixture by distillation, e) the product vinyl ester is separated by distillation from the bottom product of the distillation, and f) the remaining reaction mixture is recycled into the reactor.

Abstract: A process for selective transvinylation of a reactant carboxylic acid with a reactant vinyl ester to give a product vinyl ester and the corresponding acid of the reactant vinyl ester in the presence of one or more ruthenium catalysts, wherein a) the reactant vinyl ester, the reactant carboxylic acid and the ruthenium catalyst are supplied to a reactor, and b) the transvinylation reaction is conducted, wherein c) the transvinylation reaction is conducted at a conversion of more than 50%, d) on completion of the transvinylation reaction, the reactant vinyl ester and the corresponding acid are separated from the reaction mixture by distillation, e) the product vinyl ester is separated by distillation from the bottom product of the distillation, and f) the remaining reaction mixture is recycled into the reactor.